JPH07276124A - Machining jig for welding groove of piping - Google Patents

Abstract

PURPOSE:To easily install a groove machining jig on a joining hole part by arranging a support leg to engage with the groove machining jig on the periphery of the joining hole of piping by supporting it free to extend and contract in correspondence with the caliber of the joining hole. CONSTITUTION:A support part 11 at a step part of a lower end part of a support leg 5 abuts the inside of the periphery of a joining hole 3 by turning at turning lever 18 on the upper end of a central shaft 4 of a groove machining jig 1, extending and contracting the support leg 5 in specified dimension by way of moving a material 15 for extension and contraction and corresponding with the caliber of the joining hole 3 of piping 2. Thereafter, the groove machining jig 1 is supported vertically against the joining hole 3 by way of turning the turning lever 18 further and engaging with the inner periphery of the joining hole 3 firmly by opening the support leg 5. A groove part is cut and machined with a machining tool by turning a machining tool part around the central shaft 4 by way of holding it and sliding a copying jig 26 along the correlative curve of the side peripheral part of the joining hole 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding groove processing jig for pipes of mother pipes and branch pipes such as aluminum pipes and steel pipes.

[0002]

2. Description of the Related Art Pipes having a pipe structure are widely known as buildings and structures. In order to configure these pipe structures, based on a predetermined design plan, a joint hole of an interpenetrating curve of a predetermined diameter is opened at a predetermined side surface position of the pipe on the mother pipe side,
To this joint hole, join the tip of the pipe of the specified length that has been cut into the interpenetrating curve of the pipe on the side of the branch pipe, and weld it around the joint hole of the mother pipe and around the end of the joined branch pipe. ing.

[0003]

Conventionally, in order to weld and connect the above-mentioned pipes, the joint hole is cut into a groove surface having a predetermined inclination. It has been practiced to cut the groove portion having a depth of 1 by a working tool such as a cutter and weld the joint portion through the groove portion which is cut and recessed.

To process this groove, it is possible to automate it with a small diameter or short pipe, but it is difficult to handle with a large diameter or a very long pipe, and a groove around the joint hole is processed. The parts are marked by marking them, and based on these markings, they are machined with a machining tool such as a cutter, or they are machined with a machining tool such as a cutter based on a predetermined template. It was

Therefore, it takes much manpower and time to process the groove portion of the joint hole of the pipe, the production efficiency does not increase, and there has been a demand for improvement.

[0006]

The present invention has been made in view of the above points, and in order to solve the above problems, a joint hole at the tip of one pipe is opened on the side surface of the other pipe. A welding groove processing jig for a groove that is groove-processed around the above-mentioned bonding hole in order to connect the welded portion by welding to the perforated bonding hole. Support legs that are supported and locked to the peripheral edge of the joint hole are arranged on the groove processing jig so that they can be expanded and contracted according to the diameter of the joint hole, and the copying jig follows the correlation curve of the joint hole of the pipe. Is rotatably arranged around the central axis of the groove processing jig, and a supporting arm for mounting a processing tool for processing the groove portion around the joint hole of the pipe is attached to the groove processing jig. It is slidably mounted on the central axis so that it can swivel around the central axis and move along the penetration curve of the joint hole. The machining tool of the groove portion so as to follow the above copying jig to provide a weld groove machining tool of the pipe, characterized in that so as to mount to the support arm.

[0007]

When the welding groove processing jig of the present invention is used, the supporting leg for supporting and locking the groove processing jig on the peripheral edge of the joint hole of the pipe can be expanded or contracted in accordance with the diameter of the joint hole. By arranging the groove processing jig, it is possible to accommodate the diameter of the joint hole of the pipe to which the groove processing jig is to be connected, and the support leg can be locked and attached to the joint hole.

Further, by disposing the copying jig so as to be rotatable around the central axis of the groove processing jig along the correlation curve of the joint hole of the pipe, the joint hole of the pipe has a complicated correlation curve. Despite that, the copying jig can be swung along this correlation curve, and the groove processing can be facilitated.

Further, a supporting arm for mounting a processing tool for processing a groove portion around the joint hole of the pipe is rotatable about the central axis of the groove machining jig, and the joint hole penetrates. By arranging slidably on the central shaft so as to be movable along a curve, and by attaching the processing tool of the groove portion to the support arm so as to follow the copying jig,
When the support arm is swung with respect to the groove portion in accordance with the copying jig, the groove portion can be accurately and easily cut with a processing tool.

[0010]

EXAMPLES The present invention will be described below based on examples. 1 to 6 show an embodiment of groove processing for a mother tube of the present invention. The groove processing jig 1 has a joining hole 3 formed on a side peripheral surface of a pipe 2 of a mother pipe of an aluminum pipe based on a predetermined penetration curve, and a tip cut into the penetration curve of the branch pipe. It is for groove processing for connecting and welding, and as shown in FIGS. 1 to 4, four support legs 5 are attached to the central shaft 4.
Are mounted in an axially symmetrical manner, and the support arm 6 is provided above the central shaft 4.
The work tool 7 such as an air drive is removably mounted at a predetermined inclination angle.

The support leg 5 is formed of a sufficiently rigid body, and its upper end is attached by a pin 9 to a shaft mounting portion 8 fitted to the central shaft 4, as shown in FIGS. A projecting portion 10 is provided so as to project upward inside the portion, and a supporting portion 11 of a step portion is provided on an outer surface of a lower end portion of the projecting portion 10 so that the projecting portion 10 can be engaged with and supported by the inner peripheral edge of the joint hole 3 of the pipe 2. ing.

In particular, the lower ends of the support legs 5 are each made to project to a predetermined length by a screw rod 12 or the like so that the size of the connecting hole 3 of the penetration curve of the pipe 2 can be easily accommodated. The four-point support enables vertical engagement with the joint hole 3. Further, a slip preventing material 13 such as a rubber material is attached to the contact surface of the supporting portion 11 so that the supporting force can be increased.

A threaded portion 1 threaded on the lower portion of the central shaft 4
4, a disk-shaped expansion / contraction material 15 is screwed, and the above-mentioned support leg 5 is fitted in a notch groove 16 cut in a cross-like shape on the outer peripheral portion of the expansion / contraction material 15 as shown in FIGS. 1 to 4. The inner surfaces of the protrusions 10 are joined together. Then, the expansion / contraction material 15 is moved by turning the central shaft 4,
The support leg 5 connected by the coil spring 17 is expanded or contracted against the coil spring 17 around the mounting portion of the upper pin 9 as shown in FIG. We are able to respond appropriately. 1
Reference numeral 8 is a turning lever for turning the central axis 4.

The support arm 6 is pivotally mounted on the central shaft 4 above the shaft attachment portion 8 through a sleeve 19, and the machining tool support member 20 is attached to the support arm 6. It is attached to a long groove-shaped support adjustment portion 21 so that it can be protruded laterally by a predetermined amount. As shown in FIG. 1, a protrusion amount adjusting portion 22 is protruded upward from the machining tool supporting member 20 and the machining tool attaching member 23 is attached to the protrusion amount adjusting portion 22.
Is vertically provided, and the processing tool 7 is detachably sandwiched at a lower portion thereof at a predetermined inclination angle.

An arcuate groove 24 is provided in the machining tool support member 20 as shown in the drawing, and the protrusion amount adjusting portion 22 is fixed so as to be pivotable along the arcuate groove 24. The processing tool 7 is opposed to the surrounding groove portion 25 at a predetermined inclination angle so that the groove can be processed.

Further, as shown in FIGS. 1 and 5, a copying jig 26 for guiding a groove is vertically attached to the working tool supporting member 20 in a vertically adjustable manner. The portion is formed into an acute angle, and this tip can be swung along the correlation curve of the outer edge of the joint hole 3. Then, this copying jig 26
As shown in FIGS. 5 and 6, the outer surface of the lower end of the tool having a sharp angle is a concave surface 27 so that the processing tool 28 of the cutter of the processing tool 7 approaches the joining hole 3 of the pipe 2 as close as possible to a predetermined depth. Bevel processing is possible.

As shown in FIG. 1, the machining tool attachment member 23 is slid by a predetermined amount by the protrusion amount adjusting unit 22 so that it can be locked by a locking device 29 as appropriate, and is machined along a copying jig 26. When the tool 7 rotates the correlation curve once to cut the groove 25, the processing tool 7 is fed by a predetermined amount so that the groove can be processed to a predetermined depth.

Then, the swivel lever 18 at the upper end of the central axis 4 of the groove processing jig 1 is swung to move the expansion / contraction material 15 to expand / contract the support leg 5 to a predetermined size. 2 corresponds to the diameter of the joint hole 3 of the pipe 2 to be groove-processed, and the support portion 11 of the stepped portion at the lower end of the support leg 5 is brought into contact with the inside of the peripheral edge of the joint hole 3. And, further turning lever-18
The support leg 5 is opened, and the supporting leg 5 is firmly locked to the inner peripheral edge of the joining hole 3 to support the groove processing jig 1 vertically to the joining hole 3.

Then, the tip of the copying jig 26 is positioned in the groove 24 around the joint hole 3, and the protruding amount of the working tool supporting member 20 is adjusted and fixed to the supporting arm 6 to adjust the protruding amount. The part 22 is tilted to make the working tool 7 at a predetermined angle so as to be opposed to the groove part 25 and fixed.

Then, the protrusion amount adjusting unit 22 is adjusted to set the protrusion amount of the machining tool 7, the machining tool 7 is driven by inputting a power source, and the machining tool 7 is rotated around the central axis 4. As it goes, the copying jig 26 slides up and down along the penetration curve of the side peripheral portion of the joining hole 3, and the working tool 7
The groove 25 can be cut with the processing tool 28.

When the machining tool 7 is rotated once around the joining hole 3, the protrusion amount adjusting portion 22 is adjusted to feed the machining tool 7 by a predetermined amount, and the groove portion is again moved along the copying jig 26 as described above. 25 is cut.

In this way, the machining tool 7 is fed by a predetermined amount for each revolution to cut the groove portion 25,
A groove can be processed to a predetermined depth.

As the groove portion 25, as shown in FIG. 1, the side end of the groove portion 25 is the outer end of the joint hole 3, and the groove portion 25 can be cut so as to have a triangular cross section. The groove processing can be performed accurately and quickly through a simple jig.

Since the support leg 5 can be expanded and contracted, the pipe 2
The size of the joint hole 3 can be adjusted, and the joint hole 3 can be easily
Can be attached to. Further, since the copying jig 26 is provided on the side portion of the processing tool 28 of the processing tool 7 and guided along the copying jig 26, and the feeding amount of the processing tool 7 is adjusted, it is possible to perform the groove processing. The depth can be adjusted easily and the groove can be processed accurately.

[0025]

[Other Embodiments] FIG. 7 shows a branch pipe according to another embodiment of the present invention. In this embodiment, the basic structure is similar to that of the previous embodiment, but the working tool 7 is the joint hole 3 of the pipe 2 of the branch pipe.
The machining tool attachment member 23 is attached so as to face a predetermined angle which is substantially parallel to.

In this embodiment, as shown in FIG. 7, the protrusion amount adjusting portion 22 of the machining tool 7 is mounted on the machining tool supporting member 20 while inclining downward, and the protrusion amount adjusting portion 22 is attached to the machining tool supporting member 20. The mounting member 23 is mounted parallel to the central axis 4.

Then, the processing tool 7 is horizontally mounted on the lower portion of the processing tool attachment member 23, and faces the groove portion 25 of the joint hole 3 of the pipe 2 as described above, and is the same as the above embodiment. Then, the groove processing can be performed according to the copying jig 26.

Therefore, also in this embodiment, as shown in FIG. 7, the support portion 11 of the support leg 5 of the groove processing jig 1 is locked and opened at the inner peripheral edge of the joint hole 3 at the tip of the pipe 2 of the branch pipe. It is possible to fix the pre-machining jig 1 and cut the groove portion 25 around the joint hole 3 of the branch pipe in the same manner as described above to perform the groove processing.

In the above embodiment, the groove tool is provided with the processing tool support members having different structures for the mother pipe and the branch pipe. However, the required parts may be connected so as to be bendable. It is also possible to share the same parts.

Further, the copying jig can be appropriately attached based on the above-mentioned gist of the present invention such as being directly attached to the sleeve portion of the shaft attachment portion so as to guide the working tool.

In the above-mentioned embodiment, the groove processing is carried out manually, but the supporting arm is driven to rotate by the turning drive device, or the depth sensor is provided to automatically feed the working tool. It is also possible to process the groove with.

Further, although the aluminum pipe has been described above, the same can be applied to a pipe such as an aluminum light alloy or a steel pipe.

[0033]

As described above, according to the present invention, the support leg is expanded or contracted in accordance with the size of the joint hole formed in the pipe to mount the groove processing jig in the joint hole portion. It is possible to swivel the support arm around the central axis and move the processing tool of the processing tool attached to the support arm according to a copying jig to move the groove around the joint hole. Beveling can be carried out.

Further, by adjusting the working depth of the working tool so that the working tool can be fed by a predetermined amount into the joining hole, the groove can be accurately beveled to a constant depth. It is a thing.

[Brief description of drawings]

FIG. 1 is a front view for explaining an embodiment of the present invention,

FIG. 2 is a side sectional view of the same with a part omitted.

FIG. 3 is a plan view of the above,

FIG. 4 is a plan sectional view of the same as the above with a part omitted.

FIG. 5 is a side sectional view of a copying jig portion for guiding a processing tool,

FIG. 6 is a side view for explaining the copying jig and the machining tool, which are partially omitted.

FIG. 7 is a front view for explaining another embodiment of the above.

[Explanation of symbols]

1 ... Beveling jig 2 ... Piping 3 ... Joining hole
4 ... Central axis 5 ... Support leg 6 ... Support arm 7 ... Processing tool 11 ... Support part 25 ... Groove part 26 ... Copying jig

Claims (3)

[Claims] 1. A groove is formed around the joint hole so that the joint hole at the tip of one pipe is joined to the joint hole opened on the side surface of the other pipe to weld and connect the joint portion. A welding groove processing jig for pipes, in which the supporting leg that supports and locks the groove processing jig on the peripheral edge of the joint hole of the pipe can be expanded and contracted corresponding to the diameter of the joint hole. It is arranged in a processing jig, and a copying jig is arranged so as to be rotatable around the central axis of the groove processing jig along the correlation curve of the joint hole of the pipe, and is opened around the joint hole of the pipe. A support arm for mounting a machining tool for machining the tip can be swiveled around the central axis of the groove machining jig and slidable on the central axis so that it can move along the penetration curve of the joint hole. It is arranged and the processing tool of the groove part is attached to the support arm so as to follow the copying jig. A welding groove processing jig for piping. 2. A machining tool, wherein a profiling jig is attached to a shaft mounting portion of a groove processing jig, and the tip of the machining tool is brought close to the profiling jig so that the groove portion around the joint hole can be machined. The pipe welding groove processing jig according to claim 1, wherein the support arm is arranged at a predetermined inclination angle. 3. The welding groove processing jig for piping according to claim 1, wherein a protrusion amount adjusting tool is provided on the support arm so that the processing tool can be fed into the joining hole by a predetermined amount.